1.实体类上的注解
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@NoArgsConstructor
@AllArgsConstructor
@Data
public class User {
@TableId (type = IdType.AUTO)
private Long id;
private String name;
private Integer age;
private String email;
@TableField (fill = FieldFill.INSERT)
private Date createTime;
@TableField (fill = FieldFill.INSERT_UPDATE)
private Date updateTime;
}
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2.对注解的处理
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@Component
@Slf4j
public class MyDetaObjectHander implements MetaObjectHandler {
@Override
public void insertFill(MetaObject metaObject) {
log.info( "come to insert fill ........." );
//setFieldValByName(String fieldName, Object fieldVal, MetaObject metaObject)
this .setFieldValByName( "createTime" , new Date(),metaObject);
this .setFieldValByName( "updateTime" , new Date(),metaObject);
}
@Override
public void updateFill(MetaObject metaObject) {
log.info( "come to update fill ......." );
this .setFieldValByName( "updateTime" , new Date(),metaObject);
}
}
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3.进行添加和修改测试
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//添加用户
@Test
public void addUser(){
User user = new User();
user.setAge( 23 );
user.setEmail( "168@qq.com" );
user.setName( "gwq" );
int insert = userDao.insert(user);
System.out.println(insert);
}
@Test
public void update(){
User user = new User();
user.setAge( 23 );
user.setEmail( "168@qq.com" );
user.setName( "gwq" );
user.setId(1299641789988229125L);
int i = userDao.updateById(user);
System.out.println(i);
}
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原文链接:https://www.cnblogs.com/ghwq/p/13583110.html